One common trope is the 'knowledge advantage'. Since the character is reincarnated as Harry Potter, they often use their prior knowledge of the wizarding world's events to their advantage. For example, they might know about Voldemort's plans in advance and take steps to prevent them. Another trope is 'relationship changes'. They might interact differently with characters like Hermione and Ron, perhaps forming closer bonds or different types of relationships altogether. And then there's the 'power boost' trope. The reincarnated Harry often gains new magical abilities or is able to master existing ones more quickly due to their past experiences.
The protagonist who is reincarnated as Harry Potter is obviously very popular. Readers are interested in how they navigate the world with their new - but also familiar - identity. Hermione Granger is also popular as she often has interesting interactions with the reincarnated character. Her intelligence and strong - willed nature make her a great character to include in these fanfics.
In addition to the obvious ones, there could be new characters introduced in the fanfic. Maybe a female mentor figure who helps Harry understand her new identity as a girl in the wizarding world. There could also be other female students who become closer friends with Harry in this new form. They could support each other in dealing with the challenges of being a girl in Hogwarts, like the pressure of looking a certain way or the boys - related drama that might come up.
Well, in the world of fanfiction, just about any concept can be explored, so it's highly likely that there is a 'harry potter is loki reincarnated' fanfiction. Writers love to mash up different universes and characters. This particular concept could bring in elements of Loki's mischievous nature into Harry's character, creating a whole new set of adventures and challenges for him in the Hogwarts setting.
One great 'reincarnated Harry Potter fanfic' is 'The Second String'. It has an interesting take on Harry being reincarnated with his memories intact. The story really dives into how he uses his knowledge of the future to change things for the better in the wizarding world.
Often in these fanfics, the reincarnated character tries to change the fate of some characters. They might be determined to save Sirius Black earlier or prevent Cedric Diggory's death. This alteration of the original plot creates a whole new set of challenges and adventures. Additionally, the way they handle their identity as a reincarnated person within the wizarding world can be full of drama. Do they keep it a secret? How do they deal with the memories of their previous life while living as a new character in the Harry Potter universe?
One interesting plot could be that as a girl, Harry has to face different social expectations in the wizarding world. For example, in the original story, male and female characters might have different roles in some classes or traditions. As a reincarnated girl, she could break those stereotypes and show that gender doesn't limit one's magical abilities. Maybe she becomes more empathetic in this new form and uses it to her advantage in dealing with her friends and enemies alike.
Harry Potter himself is a popular choice. Writers often explore what would happen if someone else's soul was in Harry's body and how that would change the story. Hermione Granger is also a common one. Reincarnating as her gives the chance to delve deeper into her intelligence and how she could use it in different ways. Another popular character to be reincarnated as is Draco Malfoy. It allows for a different perspective on the Slytherin house and the Malfoy family's role in the wizarding world.
I really like 'A New Beginning for Harry Potter'. In this fanfic, the reincarnated Harry has a different perspective on his role in the wizarding world. The story dives deep into his relationships with the other characters like Hermione and Ron, and how he tries to prevent some of the tragedies that happen in the original series. It's a great read for any Potter fan.
One idea could be that Merlin, with all his ancient magic knowledge, reincarnated as Harry Potter would be able to quickly master spells at Hogwarts. He might even introduce some long - lost magic that was known in his previous life. For example, he could have a unique way of handling potions that was based on his experiences in Camelot.